AC C4 Automatic Transmission Parts

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

Learn about the functionality of key parts in a hot rod air conditioning system for install or diagnosing issues. We cover the condenser, compressor and more.

There are a lot of choices when it comes to automatic shifters, and we’ll help unpack all the options and features in our automatic shifter buyer’s guide

Ford’s small block and big block engine families have their share of flexplate differences. We’ll show you what to look for in this buyer’s guide.

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

Learn how Zach replaces a transmission and breakaway converter in his 55 Chevy, with some helpful tips along the way.

Learn how to select a torque converter. Read up on expert torque converter recommendations and learn how to choose the right stall speed for your torque converter and application.

Learn how to swap out an LS engine with a modern fuel injected engine into a hot rod for added horsepower, fuel economy, or throttle response. View a list of parts and helpful tips to complete the installation.

Speedway Motors employee Pat O. is back to talk Ford Automatic OverDrive Kickdown brackets and kits.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.